.204 Ruger, .223 Wylde chamber, .224 Valkyrie, .300 AAC Blackout, 6.5 Grendel, 6mm Creedmoor, 6.5x47mm, 6.5 Creedmoor, .260 Remington, 7mm-08, .308 Win., 6.5x55 Swedish, .300 Win. Mag., 6.5x284 Norma, or .338 Lapua Mag. cals., PF 3D action by Defiance Machine, spiral fluted bolt and tactical knob, 16-26 in. threaded Bartlein, Criterion (disc.), or Proof Research barrel, with or w/o fluting or thread protector, LMD or JP Tactical muzzle brake, Magpul drop out mag. kit, Timney (upgrades available) or TriggerTech trigger, Magpul stock, lightweight aluminum firing pin shroud, 20 MOA scope rail, black, FDE, OD Green, or gray finish, optional SS action.